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Annotation of src/sys/dev/ic/i82596.c, Revision 1.17.2.1

1.17.2.1! matt        1: /* $NetBSD: i82596.c,v 1.18 2007/10/19 11:59:53 ad Exp $ */
1.1       jkunz       2:
                      3: /*
                      4:  * Copyright (c) 2003 Jochen Kunz.
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. The name of Jochen Kunz may not be used to endorse or promote
                     16:  *    products derived from this software without specific prior
                     17:  *    written permission.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY JOCHEN KUNZ
                     20:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     21:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     22:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL JOCHEN KUNZ
                     23:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     24:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     25:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     26:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     27:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     28:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     29:  * POSSIBILITY OF SUCH DAMAGE.
                     30:  */
                     31:
                     32: /*
1.14      skrll      33:  * Driver for the Intel i82596CA and i82596DX/SX 10MBit/s Ethernet chips.
                     34:  *
1.1       jkunz      35:  * It operates the i82596 in 32-Bit Linear Mode, opposed to the old i82586
1.8       perry      36:  * ie(4) driver (src/sys/dev/ic/i82586.c), that degrades the i82596 to
1.1       jkunz      37:  * i82586 compatibility mode.
1.13      skrll      38:  *
1.14      skrll      39:  * Documentation about these chips can be found at
                     40:  *
                     41:  *     http://developer.intel.com/design/network/datashts/290218.htm
                     42:  *     http://developer.intel.com/design/network/datashts/290219.htm
1.1       jkunz      43:  */
                     44:
                     45: #include <sys/cdefs.h>
1.17.2.1! matt       46: __KERNEL_RCSID(0, "$NetBSD: i82596.c,v 1.18 2007/10/19 11:59:53 ad Exp $");
1.1       jkunz      47:
                     48: /* autoconfig and device stuff */
                     49: #include <sys/param.h>
                     50: #include <sys/device.h>
                     51: #include <sys/conf.h>
                     52: #include "locators.h"
                     53: #include "ioconf.h"
                     54:
                     55: /* bus_space / bus_dma etc. */
1.17.2.1! matt       56: #include <sys/bus.h>
        !            57: #include <sys/intr.h>
1.1       jkunz      58:
                     59: /* general system data and functions */
                     60: #include <sys/systm.h>
                     61: #include <sys/ioctl.h>
                     62:
                     63: /* tsleep / sleep / wakeup */
                     64: #include <sys/proc.h>
                     65: /* hz for above */
                     66: #include <sys/kernel.h>
                     67:
                     68: /* network stuff */
                     69: #include <net/if.h>
                     70: #include <net/if_dl.h>
                     71: #include <net/if_media.h>
                     72: #include <net/if_ether.h>
                     73: #include <sys/socket.h>
                     74: #include <sys/mbuf.h>
                     75:
                     76: #include "bpfilter.h"
1.8       perry      77: #if NBPFILTER > 0
1.1       jkunz      78: #include <net/bpf.h>
1.8       perry      79: #endif
1.1       jkunz      80:
                     81: #include <dev/ic/i82596reg.h>
                     82: #include <dev/ic/i82596var.h>
                     83:
                     84: /* Supported chip variants */
1.10      skrll      85: const char *i82596_typenames[] = { "unknown", "DX/SX", "CA" };
1.1       jkunz      86:
                     87: /* media change and status callback */
                     88: static int iee_mediachange(struct ifnet *);
                     89: static void iee_mediastatus(struct ifnet *, struct ifmediareq *);
                     90:
                     91: /* interface routines to upper protocols */
                     92: static void iee_start(struct ifnet *);                 /* initiate output */
1.15      christos   93: static int iee_ioctl(struct ifnet *, u_long, void *);  /* ioctl routine */
1.1       jkunz      94: static int iee_init(struct ifnet *);                   /* init routine */
                     95: static void iee_stop(struct ifnet *, int);             /* stop routine */
                     96: static void iee_watchdog(struct ifnet *);              /* timer routine */
                     97:
                     98: /* internal helper functions */
1.7       tsutsui    99: static void iee_cb_setup(struct iee_softc *, uint32_t);
1.1       jkunz     100:
                    101: /*
1.13      skrll     102:  * Things a MD frontend has to provide:
                    103:  *
                    104:  * The functions via function pointers in the softc:
                    105:  *     int (*sc_iee_cmd)(struct iee_softc *sc, uint32_t cmd);
                    106:  *     int (*sc_iee_reset)(struct iee_softc *sc);
                    107:  *     void (*sc_mediastatus)(struct ifnet *, struct ifmediareq *);
                    108:  *     int (*sc_mediachange)(struct ifnet *);
                    109:  *
                    110:  * sc_iee_cmd(): send a command to the i82596 by writing the cmd parameter
                    111:  *     to the SCP cmd word and issuing a Channel Attention.
                    112:  * sc_iee_reset(): initiate a reset, supply the address of the SCP to the
                    113:  *     chip, wait for the chip to initialize and ACK interrupts that
                    114:  *     this may have caused by calling (sc->sc_iee_cmd)(sc, IEE_SCB_ACK);
                    115:  * This functions must carefully bus_dmamap_sync() all data they have touched!
                    116:  *
                    117:  * sc_mediastatus() and sc_mediachange() are just MD hooks to the according
                    118:  * MI functions. The MD frontend may set this pointers to NULL when they
                    119:  * are not needed.
                    120:  *
                    121:  * sc->sc_type has to be set to I82596_UNKNOWN or I82596_DX or I82596_CA.
                    122:  * This is for printing out the correct chip type at attach time only. The
                    123:  * MI backend doesn't distinguish different chip types when programming
                    124:  * the chip.
                    125:  *
                    126:  * sc->sc_flags has to be set to 0 on little endian hardware and to
                    127:  * IEE_NEED_SWAP on big endian hardware, when endianess conversion is not
                    128:  * done by the bus attachment. Usually you need to set IEE_NEED_SWAP
                    129:  * when IEE_SYSBUS_BE is set in the sysbus byte.
                    130:  *
                    131:  * sc->sc_cl_align must be set to 1 or to the cache line size. When set to
                    132:  * 1 no special alignment of DMA descriptors is done. If sc->sc_cl_align != 1
                    133:  * it forces alignment of the data structures in the shared memory to a multiple
                    134:  * of sc->sc_cl_align. This is needed on archs like hp700 that have non DMA
                    135:  * I/O coherent caches and are unable to map the shared memory uncachable.
                    136:  * (At least pre PA7100LC CPUs are unable to map memory uncachable.)
                    137:  *
                    138:  * sc->sc_cl_align MUST BE INITIALIZED BEFORE THE FOLLOWING MACROS ARE USED:
                    139:  * SC_* IEE_*_SZ IEE_*_OFF IEE_SHMEM_MAX (shell style glob(3) pattern)
                    140:  *
                    141:  * The MD frontend has to allocate a piece of DMA memory at least of
                    142:  * IEE_SHMEM_MAX bytes size. All communication with the chip is done via
                    143:  * this shared memory. If possible map this memory non-cachable on
                    144:  * archs with non DMA I/O coherent caches. The base of the memory needs
                    145:  * to be aligned to an even address if sc->sc_cl_align == 1 and aligned
                    146:  * to a cache line if sc->sc_cl_align != 1.
                    147:  *
                    148:  * An interrupt with iee_intr() as handler must be established.
                    149:  *
                    150:  * Call void iee_attach(struct iee_softc *sc, uint8_t *ether_address,
                    151:  * int *media, int nmedia, int defmedia); when everything is set up. First
                    152:  * parameter is a pointer to the MI softc, ether_address is an array that
                    153:  * contains the ethernet address. media is an array of the media types
                    154:  * provided by the hardware. The members of this array are supplied to
                    155:  * ifmedia_add() in sequence. nmedia is the count of elements in media.
                    156:  * defmedia is the default media that is set via ifmedia_set().
                    157:  * nmedia and defmedia are ignored when media == NULL.
                    158:  *
                    159:  * The MD backend may call iee_detach() to detach the device.
                    160:  *
                    161:  * See sys/arch/hp700/gsc/if_iee_gsc.c for an example.
                    162:  */
1.1       jkunz     163:
                    164:
                    165: /*
1.13      skrll     166:  * How frame reception is done:
                    167:  * Each Receive Frame Descriptor has one associated Receive Buffer Descriptor.
                    168:  * Each RBD points to the data area of an mbuf cluster. The RFDs are linked
                    169:  * together in a circular list. sc->sc_rx_done is the count of RFDs in the
                    170:  * list already processed / the number of the RFD that has to be checked for
                    171:  * a new frame first at the next RX interrupt. Upon successful reception of
                    172:  * a frame the mbuf cluster is handled to upper protocol layers, a new mbuf
                    173:  * cluster is allocated and the RFD / RBD are reinitialized accordingly.
                    174:  *
                    175:  * When a RFD list overrun occurred the whole RFD and RBD lists are reinitialized
                    176:  * and frame reception is started again.
                    177:  */
1.1       jkunz     178: int
                    179: iee_intr(void *intarg)
                    180: {
                    181:        struct iee_softc *sc = intarg;
                    182:        struct ifnet *ifp = &sc->sc_ethercom.ec_if;
                    183:        struct iee_rfd *rfd;
                    184:        struct iee_rbd *rbd;
                    185:        bus_dmamap_t rx_map;
                    186:        struct mbuf *rx_mbuf;
                    187:        struct mbuf *new_mbuf;
                    188:        int scb_status;
                    189:        int scb_cmd;
1.6       tsutsui   190:        int n, col;
1.1       jkunz     191:
                    192:        if ((ifp->if_flags & IFF_RUNNING) == 0) {
                    193:                (sc->sc_iee_cmd)(sc, IEE_SCB_ACK);
                    194:                return(1);
                    195:        }
                    196:        bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, 0, IEE_SHMEM_MAX,
                    197:            BUS_DMASYNC_POSTREAD);
                    198:        scb_status = SC_SCB->scb_status;
                    199:        scb_cmd = SC_SCB->scb_cmd;
                    200:        rfd = SC_RFD(sc->sc_rx_done);
1.2       jkunz     201:        while ((rfd->rfd_status & IEE_RFD_C) != 0) {
1.1       jkunz     202:                /* At least one packet was received. */
                    203:                rbd = SC_RBD(sc->sc_rx_done);
                    204:                rx_map = sc->sc_rx_map[sc->sc_rx_done];
                    205:                rx_mbuf = sc->sc_rx_mbuf[sc->sc_rx_done];
                    206:                SC_RBD((sc->sc_rx_done + IEE_NRFD - 1) % IEE_NRFD)->rbd_size
                    207:                    &= ~IEE_RBD_EL;
                    208:                if ((rfd->rfd_status & IEE_RFD_OK) == 0
                    209:                    || (rbd->rbd_count & IEE_RBD_EOF) == 0
                    210:                    || (rbd->rbd_count & IEE_RBD_F) == 0){
                    211:                        /* Receive error, skip frame and reuse buffer. */
                    212:                        rfd->rfd_status = 0;
                    213:                        rbd->rbd_count = 0;
                    214:                        rbd->rbd_size = IEE_RBD_EL | rx_map->dm_segs[0].ds_len;
                    215:                        printf("%s: iee_intr: receive error %d, rfd_status="
1.8       perry     216:                            "0x%.4x, rfd_count=0x%.4x\n", sc->sc_dev.dv_xname,
1.1       jkunz     217:                            ++sc->sc_rx_err, rfd->rfd_status, rbd->rbd_count);
                    218:                        sc->sc_rx_done = (sc->sc_rx_done + 1) % IEE_NRFD;
                    219:                        continue;
                    220:                }
                    221:                rfd->rfd_status = 0;
                    222:                bus_dmamap_sync(sc->sc_dmat, rx_map, 0, rx_mbuf->m_ext.ext_size,
                    223:                    BUS_DMASYNC_POSTREAD);
1.8       perry     224:                rx_mbuf->m_pkthdr.len = rx_mbuf->m_len =
1.1       jkunz     225:                    rbd->rbd_count & IEE_RBD_COUNT;
                    226:                rx_mbuf->m_pkthdr.rcvif = ifp;
                    227:                MGETHDR(new_mbuf, M_DONTWAIT, MT_DATA);
                    228:                if (new_mbuf == NULL) {
                    229:                        printf("%s: iee_intr: can't allocate mbuf\n",
                    230:                            sc->sc_dev.dv_xname);
                    231:                        break;
                    232:                }
                    233:                MCLAIM(new_mbuf, &sc->sc_ethercom.ec_rx_mowner);
                    234:                MCLGET(new_mbuf, M_DONTWAIT);
                    235:                if ((new_mbuf->m_flags & M_EXT) == 0) {
1.8       perry     236:                        printf("%s: iee_intr: can't alloc mbuf cluster\n",
1.1       jkunz     237:                            sc->sc_dev.dv_xname);
                    238:                        m_freem(new_mbuf);
                    239:                        break;
                    240:                }
                    241:                bus_dmamap_unload(sc->sc_dmat, rx_map);
1.8       perry     242:                if (bus_dmamap_load(sc->sc_dmat, rx_map,
                    243:                    new_mbuf->m_ext.ext_buf, new_mbuf->m_ext.ext_size,
1.1       jkunz     244:                    NULL, BUS_DMA_READ | BUS_DMA_NOWAIT) != 0)
                    245:                        panic("%s: iee_intr: can't load RX DMA map\n",
                    246:                            sc->sc_dev.dv_xname);
                    247:                bus_dmamap_sync(sc->sc_dmat, rx_map, 0,
                    248:                    new_mbuf->m_ext.ext_size, BUS_DMASYNC_PREREAD);
                    249: #if NBPFILTER > 0
                    250:                if (ifp->if_bpf != 0)
                    251:                        bpf_mtap(ifp->if_bpf, rx_mbuf);
                    252: #endif /* NBPFILTER > 0 */
                    253:                (*ifp->if_input)(ifp, rx_mbuf);
                    254:                ifp->if_ipackets++;
                    255:                sc->sc_rx_mbuf[sc->sc_rx_done] = new_mbuf;
                    256:                rbd->rbd_count = 0;
                    257:                rbd->rbd_size = IEE_RBD_EL | rx_map->dm_segs[0].ds_len;
                    258:                rbd->rbd_rb_addr = rx_map->dm_segs[0].ds_addr;
                    259:                sc->sc_rx_done = (sc->sc_rx_done + 1) % IEE_NRFD;
                    260:                rfd = SC_RFD(sc->sc_rx_done);
                    261:        }
                    262:        if ((scb_status & IEE_SCB_RUS) == IEE_SCB_RUS_NR1
                    263:            || (scb_status & IEE_SCB_RUS) == IEE_SCB_RUS_NR2
                    264:            || (scb_status & IEE_SCB_RUS) == IEE_SCB_RUS_NR3) {
                    265:                /* Receive Overrun, reinit receive ring buffer. */
                    266:                for (n = 0 ; n < IEE_NRFD ; n++) {
                    267:                        SC_RFD(n)->rfd_cmd = IEE_RFD_SF;
                    268:                        SC_RFD(n)->rfd_link_addr = IEE_PHYS_SHMEM(IEE_RFD_OFF
                    269:                            + IEE_RFD_SZ * ((n + 1) % IEE_NRFD));
1.8       perry     270:                        SC_RBD(n)->rbd_next_rbd = IEE_PHYS_SHMEM(IEE_RBD_OFF
1.1       jkunz     271:                            + IEE_RBD_SZ * ((n + 1) % IEE_NRFD));
1.8       perry     272:                        SC_RBD(n)->rbd_size = IEE_RBD_EL |
1.1       jkunz     273:                            sc->sc_rx_map[n]->dm_segs[0].ds_len;
1.8       perry     274:                        SC_RBD(n)->rbd_rb_addr =
1.1       jkunz     275:                            sc->sc_rx_map[n]->dm_segs[0].ds_addr;
                    276:                }
                    277:                SC_RFD(0)->rfd_rbd_addr = IEE_PHYS_SHMEM(IEE_RBD_OFF);
                    278:                sc->sc_rx_done = 0;
1.8       perry     279:                bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_RFD_OFF,
1.1       jkunz     280:                    IEE_RFD_LIST_SZ + IEE_RBD_LIST_SZ, BUS_DMASYNC_PREWRITE);
                    281:                (sc->sc_iee_cmd)(sc, IEE_SCB_RUC_ST);
1.8       perry     282:                printf("%s: iee_intr: receive ring buffer overrun\n",
1.1       jkunz     283:                    sc->sc_dev.dv_xname);
1.2       jkunz     284:        }
1.1       jkunz     285:
1.8       perry     286:        if (sc->sc_next_cb != 0
1.2       jkunz     287:            && (SC_CB(sc->sc_next_cb - 1)->cb_status & IEE_CB_C) != 0) {
1.1       jkunz     288:                /* CMD list finished */
                    289:                ifp->if_timer = 0;
                    290:                if (sc->sc_next_tbd != 0) {
1.12      skrll     291:                        /* A TX CMD list finished, cleanup */
1.1       jkunz     292:                        for (n = 0 ; n < sc->sc_next_cb ; n++) {
                    293:                                m_freem(sc->sc_tx_mbuf[n]);
                    294:                                sc->sc_tx_mbuf[n] = NULL;
                    295:                                bus_dmamap_unload(sc->sc_dmat,sc->sc_tx_map[n]);
1.8       perry     296:                                if ((SC_CB(n)->cb_status & IEE_CB_COL) != 0 &&
1.1       jkunz     297:                                    (SC_CB(n)->cb_status & IEE_CB_MAXCOL) == 0)
1.6       tsutsui   298:                                        col = 16;
1.1       jkunz     299:                                else
1.8       perry     300:                                        col = SC_CB(n)->cb_status
1.1       jkunz     301:                                            & IEE_CB_MAXCOL;
1.6       tsutsui   302:                                sc->sc_tx_col += col;
                    303:                                if ((SC_CB(n)->cb_status & IEE_CB_OK) != 0) {
                    304:                                        ifp->if_opackets++;
                    305:                                        ifp->if_collisions += col;
                    306:                                }
1.1       jkunz     307:                        }
                    308:                        sc->sc_next_tbd = 0;
                    309:                        ifp->if_flags &= ~IFF_OACTIVE;
                    310:                }
                    311:                for (n = 0 ; n < sc->sc_next_cb ; n++) {
                    312:                        /* Check if a CMD failed, but ignore TX errors. */
                    313:                        if ((SC_CB(n)->cb_cmd & IEE_CB_CMD) != IEE_CB_CMD_TR
1.2       jkunz     314:                            && ((SC_CB(n)->cb_status & IEE_CB_OK) == 0))
1.8       perry     315:                                printf("%s: iee_intr: scb_status=0x%x "
1.1       jkunz     316:                                    "scb_cmd=0x%x failed command %d: "
1.8       perry     317:                                    "cb_status[%d]=0x%.4x cb_cmd[%d]=0x%.4x\n",
                    318:                                    sc->sc_dev.dv_xname, scb_status, scb_cmd,
1.1       jkunz     319:                                    ++sc->sc_cmd_err, n, SC_CB(n)->cb_status,
                    320:                                    n, SC_CB(n)->cb_cmd);
                    321:                }
                    322:                sc->sc_next_cb = 0;
                    323:                if ((sc->sc_flags & IEE_WANT_MCAST) != 0) {
1.8       perry     324:                        iee_cb_setup(sc, IEE_CB_CMD_MCS | IEE_CB_S | IEE_CB_EL
1.1       jkunz     325:                            | IEE_CB_I);
                    326:                        (sc->sc_iee_cmd)(sc, IEE_SCB_CUC_EXE);
                    327:                } else
1.12      skrll     328:                        /* Try to get deferred packets going. */
1.1       jkunz     329:                        iee_start(ifp);
                    330:        }
                    331:        if (IEE_SWAP(SC_SCB->scb_crc_err) != sc->sc_crc_err) {
                    332:                sc->sc_crc_err = IEE_SWAP(SC_SCB->scb_crc_err);
1.8       perry     333:                printf("%s: iee_intr: crc_err=%d\n", sc->sc_dev.dv_xname,
1.1       jkunz     334:                    sc->sc_crc_err);
                    335:        }
                    336:        if (IEE_SWAP(SC_SCB->scb_align_err) != sc->sc_align_err) {
                    337:                sc->sc_align_err = IEE_SWAP(SC_SCB->scb_align_err);
1.8       perry     338:                printf("%s: iee_intr: align_err=%d\n", sc->sc_dev.dv_xname,
1.1       jkunz     339:                    sc->sc_align_err);
                    340:        }
                    341:        if (IEE_SWAP(SC_SCB->scb_resource_err) != sc->sc_resource_err) {
                    342:                sc->sc_resource_err = IEE_SWAP(SC_SCB->scb_resource_err);
1.8       perry     343:                printf("%s: iee_intr: resource_err=%d\n", sc->sc_dev.dv_xname,
1.1       jkunz     344:                    sc->sc_resource_err);
                    345:        }
                    346:        if (IEE_SWAP(SC_SCB->scb_overrun_err) != sc->sc_overrun_err) {
                    347:                sc->sc_overrun_err = IEE_SWAP(SC_SCB->scb_overrun_err);
1.8       perry     348:                printf("%s: iee_intr: overrun_err=%d\n", sc->sc_dev.dv_xname,
1.1       jkunz     349:                    sc->sc_overrun_err);
                    350:        }
                    351:        if (IEE_SWAP(SC_SCB->scb_rcvcdt_err) != sc->sc_rcvcdt_err) {
                    352:                sc->sc_rcvcdt_err = IEE_SWAP(SC_SCB->scb_rcvcdt_err);
1.8       perry     353:                printf("%s: iee_intr: rcvcdt_err=%d\n", sc->sc_dev.dv_xname,
1.1       jkunz     354:                    sc->sc_rcvcdt_err);
                    355:        }
                    356:        if (IEE_SWAP(SC_SCB->scb_short_fr_err) != sc->sc_short_fr_err) {
                    357:                sc->sc_short_fr_err = IEE_SWAP(SC_SCB->scb_short_fr_err);
1.8       perry     358:                printf("%s: iee_intr: short_fr_err=%d\n", sc->sc_dev.dv_xname,
1.1       jkunz     359:                    sc->sc_short_fr_err);
                    360:        }
1.8       perry     361:        bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, 0, IEE_SHMEM_MAX,
1.2       jkunz     362:            BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
1.1       jkunz     363:        (sc->sc_iee_cmd)(sc, IEE_SCB_ACK);
                    364:        return(1);
                    365: }
                    366:
                    367:
                    368:
                    369: /*
1.13      skrll     370:  * How Command Block List Processing is done.
                    371:  *
                    372:  * A running CBL is never manipulated. If there is a CBL already running,
                    373:  * further CMDs are deferred until the current list is done. A new list is
                    374:  * setup when the old one has finished.
                    375:  * This eases programming. To manipulate a running CBL it is necessary to
                    376:  * suspend the Command Unit to avoid race conditions. After a suspend
                    377:  * is sent we have to wait for an interrupt that ACKs the suspend. Then
                    378:  * we can manipulate the CBL and resume operation. I am not sure that this
                    379:  * is more effective then the current, much simpler approach. => KISS
                    380:  * See i82596CA data sheet page 26.
                    381:  *
                    382:  * A CBL is running or on the way to be set up when (sc->sc_next_cb != 0).
                    383:  *
                    384:  * A CBL may consist of TX CMDs, and _only_ TX CMDs.
                    385:  * A TX CBL is running or on the way to be set up when
                    386:  * ((sc->sc_next_cb != 0) && (sc->sc_next_tbd != 0)).
                    387:  *
                    388:  * A CBL may consist of other non-TX CMDs like IAS or CONF, and _only_
                    389:  * non-TX CMDs.
                    390:  *
                    391:  * This comes mostly through the way how an Ethernet driver works and
                    392:  * because running CBLs are not manipulated when they are on the way. If
                    393:  * if_start() is called there will be TX CMDs enqueued so we have a running
                    394:  * CBL and other CMDs from e.g. if_ioctl() will be deferred and vice versa.
                    395:  *
                    396:  * The Multicast Setup Command is special. A MCS needs more space than
                    397:  * a single CB has. Actual space requirement depends on the length of the
                    398:  * multicast list. So we always defer MCS until other CBLs are finished,
                    399:  * then we setup a CONF CMD in the first CB. The CONF CMD is needed to
                    400:  * turn ALLMULTI on the hardware on or off. The MCS is the 2nd CB and may
                    401:  * use all the remaining space in the CBL and the Transmit Buffer Descriptor
                    402:  * List. (Therefore CBL and TBDL must be continuous in physical and virtual
                    403:  * memory. This is guaranteed through the definitions of the list offsets
                    404:  * in i82596reg.h and because it is only a single DMA segment used for all
                    405:  * lists.) When ALLMULTI is enabled via the CONF CMD, the MCS is run with
                    406:  * a multicast list length of 0, thus disabling the multicast filter.
                    407:  * A deferred MCS is signaled via ((sc->sc_flags & IEE_WANT_MCAST) != 0)
                    408:  */
1.1       jkunz     409: void
1.7       tsutsui   410: iee_cb_setup(struct iee_softc *sc, uint32_t cmd)
1.1       jkunz     411: {
                    412:        struct iee_cb *cb = SC_CB(sc->sc_next_cb);
                    413:        struct ifnet *ifp = &sc->sc_ethercom.ec_if;
                    414:        struct ether_multistep step;
                    415:        struct ether_multi *enm;
                    416:
                    417:        memset(cb, 0, IEE_CB_SZ);
                    418:        cb->cb_cmd = cmd;
                    419:        switch(cmd & IEE_CB_CMD) {
                    420:        case IEE_CB_CMD_NOP:    /* NOP CMD */
                    421:                break;
                    422:        case IEE_CB_CMD_IAS:    /* Individual Address Setup */
1.17      dyoung    423:                memcpy(__UNVOLATILE(cb->cb_ind_addr), CLLADDR(ifp->if_sadl),
1.1       jkunz     424:                    ETHER_ADDR_LEN);
                    425:                break;
                    426:        case IEE_CB_CMD_CONF:   /* Configure */
1.9       he        427:                memcpy(__UNVOLATILE(cb->cb_cf), sc->sc_cf, sc->sc_cf[0]
1.1       jkunz     428:                    & IEE_CF_0_CNT_M);
                    429:                break;
                    430:        case IEE_CB_CMD_MCS:    /* Multicast Setup */
                    431:                if (sc->sc_next_cb != 0) {
                    432:                        sc->sc_flags |= IEE_WANT_MCAST;
                    433:                        return;
                    434:                }
                    435:                sc->sc_flags &= ~IEE_WANT_MCAST;
                    436:                if ((sc->sc_cf[8] & IEE_CF_8_PRM) != 0) {
                    437:                        /* Need no multicast filter in promisc mode. */
1.8       perry     438:                        iee_cb_setup(sc, IEE_CB_CMD_CONF | IEE_CB_S | IEE_CB_EL
1.1       jkunz     439:                            | IEE_CB_I);
                    440:                        return;
                    441:                }
                    442:                /* Leave room for a CONF CMD to en/dis-able ALLMULTI mode */
                    443:                cb = SC_CB(sc->sc_next_cb + 1);
                    444:                cb->cb_cmd = cmd;
                    445:                cb->cb_mcast.mc_size = 0;
                    446:                ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm);
                    447:                while (enm != NULL) {
1.8       perry     448:                        if (memcmp(enm->enm_addrlo, enm->enm_addrhi,
                    449:                            ETHER_ADDR_LEN) != 0 || cb->cb_mcast.mc_size
1.1       jkunz     450:                            * ETHER_ADDR_LEN + 2 * IEE_CB_SZ
                    451:                            > IEE_CB_LIST_SZ + IEE_TBD_LIST_SZ) {
                    452:                                cb->cb_mcast.mc_size = 0;
                    453:                                break;
                    454:                        }
1.9       he        455:                        memcpy(__UNVOLATILE(&cb->cb_mcast.mc_addrs[
                    456:                            cb->cb_mcast.mc_size * ETHER_ADDR_LEN]),
1.1       jkunz     457:                            enm->enm_addrlo, ETHER_ADDR_LEN);
                    458:                        ETHER_NEXT_MULTI(step, enm);
                    459:                        cb->cb_mcast.mc_size++;
                    460:                }
                    461:                if (cb->cb_mcast.mc_size == 0) {
                    462:                        /* Can't do exact mcast filtering, do ALLMULTI mode. */
                    463:                        ifp->if_flags |= IFF_ALLMULTI;
                    464:                        sc->sc_cf[11] &= ~IEE_CF_11_MCALL;
                    465:                } else {
                    466:                        /* disable ALLMULTI and load mcast list */
                    467:                        ifp->if_flags &= ~IFF_ALLMULTI;
                    468:                        sc->sc_cf[11] |= IEE_CF_11_MCALL;
                    469:                        /* Mcast setup may need more then IEE_CB_SZ bytes. */
1.8       perry     470:                        bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map,
                    471:                            IEE_CB_OFF, IEE_CB_LIST_SZ + IEE_TBD_LIST_SZ,
1.1       jkunz     472:                            BUS_DMASYNC_PREWRITE);
                    473:                }
                    474:                iee_cb_setup(sc, IEE_CB_CMD_CONF);
                    475:                break;
                    476:        case IEE_CB_CMD_TR:     /* Transmit */
                    477:                cb->cb_transmit.tx_tbd_addr = IEE_PHYS_SHMEM(IEE_TBD_OFF
                    478:                    + IEE_TBD_SZ * sc->sc_next_tbd);
1.12      skrll     479:                cb->cb_cmd |= IEE_CB_SF; /* Always use Flexible Mode. */
1.1       jkunz     480:                break;
                    481:        case IEE_CB_CMD_TDR:    /* Time Domain Reflectometry */
                    482:                break;
                    483:        case IEE_CB_CMD_DUMP:   /* Dump */
                    484:                break;
                    485:        case IEE_CB_CMD_DIAG:   /* Diagnose */
                    486:                break;
                    487:        default:
                    488:                /* can't happen */
                    489:                break;
                    490:        }
1.8       perry     491:        cb->cb_link_addr = IEE_PHYS_SHMEM(IEE_CB_OFF + IEE_CB_SZ *
1.1       jkunz     492:            (sc->sc_next_cb + 1));
1.8       perry     493:        bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_CB_OFF
1.1       jkunz     494:            + IEE_CB_SZ * sc->sc_next_cb, IEE_CB_SZ, BUS_DMASYNC_PREWRITE);
                    495:        sc->sc_next_cb++;
                    496:        ifp->if_timer = 5;
                    497:        return;
                    498: }
                    499:
                    500:
                    501:
                    502: void
1.8       perry     503: iee_attach(struct iee_softc *sc, uint8_t *eth_addr, int *media, int nmedia,
1.1       jkunz     504:     int defmedia)
                    505: {
                    506:        struct ifnet *ifp = &sc->sc_ethercom.ec_if;
                    507:        int n;
                    508:
                    509:        /* Set pointer to Intermediate System Configuration Pointer. */
                    510:        /* Phys. addr. in big endian order. (Big endian as defined by Intel.) */
                    511:        SC_SCP->scp_iscp_addr = IEE_SWAP(IEE_PHYS_SHMEM(IEE_ISCP_OFF));
                    512:        /* Set pointer to System Control Block. */
                    513:        /* Phys. addr. in big endian order. (Big endian as defined by Intel.) */
                    514:        SC_ISCP->iscp_scb_addr = IEE_SWAP(IEE_PHYS_SHMEM(IEE_SCB_OFF));
                    515:        /* Set pointer to Receive Frame Area. (physical address) */
                    516:        SC_SCB->scb_rfa_addr = IEE_PHYS_SHMEM(IEE_RFD_OFF);
                    517:        /* Set pointer to Command Block. (physical address) */
                    518:        SC_SCB->scb_cmd_blk_addr = IEE_PHYS_SHMEM(IEE_CB_OFF);
                    519:
                    520:        ifmedia_init(&sc->sc_ifmedia, 0, iee_mediachange, iee_mediastatus);
                    521:        if (media != NULL) {
                    522:                for (n = 0 ; n < nmedia ; n++)
                    523:                        ifmedia_add(&sc->sc_ifmedia, media[n], 0, NULL);
                    524:                ifmedia_set(&sc->sc_ifmedia, defmedia);
                    525:        } else {
                    526:                ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_NONE, 0, NULL);
                    527:                ifmedia_set(&sc->sc_ifmedia, IFM_ETHER | IFM_NONE);
                    528:        }
                    529:
                    530:        ifp->if_softc = sc;
                    531:        strcpy(ifp->if_xname, sc->sc_dev.dv_xname);
                    532:        ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
                    533:        ifp->if_start = iee_start;      /* initiate output routine */
                    534:        ifp->if_ioctl = iee_ioctl;      /* ioctl routine */
                    535:        ifp->if_init = iee_init;        /* init routine */
                    536:        ifp->if_stop = iee_stop;        /* stop routine */
                    537:        ifp->if_watchdog = iee_watchdog;        /* timer routine */
                    538:        IFQ_SET_READY(&ifp->if_snd);
                    539:        /* iee supports IEEE 802.1Q Virtual LANs, see vlan(4). */
                    540:        sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU;
                    541:
                    542:        if_attach(ifp);
                    543:        ether_ifattach(ifp, eth_addr);
                    544:
                    545:        aprint_normal(": Intel 82596%s address %s\n",
                    546:            i82596_typenames[ sc->sc_type], ether_sprintf(eth_addr));
                    547:
                    548:        for (n = 0 ; n < IEE_NCB ; n++)
                    549:                sc->sc_tx_map[n] = NULL;
                    550:        for (n = 0 ; n < IEE_NRFD ; n++) {
                    551:                sc->sc_rx_mbuf[n] = NULL;
                    552:                sc->sc_rx_map[n] = NULL;
                    553:        }
                    554:        sc->sc_tx_timeout = 0;
                    555:        sc->sc_setup_timeout = 0;
                    556:        (sc->sc_iee_reset)(sc);
                    557:        return;
                    558: }
                    559:
                    560:
                    561:
                    562: void
                    563: iee_detach(struct iee_softc *sc, int flags)
                    564: {
                    565:        struct ifnet *ifp = &sc->sc_ethercom.ec_if;
                    566:
                    567:        if ((ifp->if_flags & IFF_RUNNING) != 0)
                    568:                iee_stop(ifp, 1);
                    569:        ether_ifdetach(ifp);
                    570:        if_detach(ifp);
                    571:        return;
                    572: }
                    573:
                    574:
                    575:
                    576: /* media change and status callback */
                    577: int
                    578: iee_mediachange(struct ifnet *ifp)
                    579: {
                    580:        struct iee_softc *sc = ifp->if_softc;
1.8       perry     581:
1.1       jkunz     582:        if (sc->sc_mediachange != NULL)
                    583:                return ((sc->sc_mediachange)(ifp));
                    584:        return(0);
                    585: }
                    586:
                    587:
                    588:
                    589: void
                    590: iee_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmreq)
                    591: {
                    592:        struct iee_softc *sc = ifp->if_softc;
                    593:
                    594:        if (sc->sc_mediastatus != NULL)
                    595:                return ((sc->sc_mediastatus)(ifp, ifmreq));
                    596:        return;
                    597: }
                    598:
                    599:
                    600:
                    601: /* initiate output routine */
                    602: void
                    603: iee_start(struct ifnet *ifp)
                    604: {
                    605:        struct iee_softc *sc = ifp->if_softc;
                    606:        struct mbuf *m = NULL;
                    607:        int t;
                    608:        int n;
                    609:
                    610:        if (sc->sc_next_cb != 0)
1.12      skrll     611:                /* There is already a CMD running. Defer packet enqueuing. */
1.1       jkunz     612:                return;
                    613:        for (t = 0 ; t < IEE_NCB ; t++) {
                    614:                IFQ_DEQUEUE(&ifp->if_snd, sc->sc_tx_mbuf[t]);
                    615:                if (sc->sc_tx_mbuf[t] == NULL)
                    616:                        break;
                    617:                if (bus_dmamap_load_mbuf(sc->sc_dmat, sc->sc_tx_map[t],
                    618:                    sc->sc_tx_mbuf[t], BUS_DMA_WRITE | BUS_DMA_NOWAIT) != 0) {
                    619:                        /*
1.8       perry     620:                         * The packet needs more TBD then we support.
                    621:                         * Copy the packet into a mbuf cluster to get it out.
1.1       jkunz     622:                         */
1.8       perry     623:                        printf("%s: iee_start: failed to load DMA map\n",
1.1       jkunz     624:                            sc->sc_dev.dv_xname);
                    625:                        MGETHDR(m, M_DONTWAIT, MT_DATA);
                    626:                        if (m == NULL) {
                    627:                                printf("%s: iee_start: can't allocate mbuf\n",
                    628:                                    sc->sc_dev.dv_xname);
                    629:                                m_freem(sc->sc_tx_mbuf[t]);
                    630:                                t--;
                    631:                                continue;
                    632:                        }
                    633:                        MCLAIM(m, &sc->sc_ethercom.ec_rx_mowner);
                    634:                        MCLGET(m, M_DONTWAIT);
                    635:                        if ((m->m_flags & M_EXT) == 0) {
                    636:                                printf("%s: iee_start: can't allocate mbuf "
                    637:                                    "cluster\n", sc->sc_dev.dv_xname);
                    638:                                m_freem(sc->sc_tx_mbuf[t]);
                    639:                                m_freem(m);
                    640:                                t--;
                    641:                                continue;
                    642:                        }
1.8       perry     643:                        m_copydata(sc->sc_tx_mbuf[t], 0,
1.15      christos  644:                            sc->sc_tx_mbuf[t]->m_pkthdr.len, mtod(m, void *));
1.1       jkunz     645:                        m->m_pkthdr.len = sc->sc_tx_mbuf[t]->m_pkthdr.len;
                    646:                        m->m_len = sc->sc_tx_mbuf[t]->m_pkthdr.len;
                    647:                        m_freem(sc->sc_tx_mbuf[t]);
                    648:                        sc->sc_tx_mbuf[t] = m;
                    649:                        if(bus_dmamap_load_mbuf(sc->sc_dmat, sc->sc_tx_map[t],
                    650:                            m, BUS_DMA_WRITE | BUS_DMA_NOWAIT) != 0) {
                    651:                                printf("%s: iee_start: can't load TX DMA map\n",
                    652:                                    sc->sc_dev.dv_xname);
                    653:                                m_freem(sc->sc_tx_mbuf[t]);
                    654:                                t--;
                    655:                                continue;
                    656:                        }
                    657:                }
                    658:                for (n = 0 ; n < sc->sc_tx_map[t]->dm_nsegs ; n++) {
                    659:                        SC_TBD(sc->sc_next_tbd + n)->tbd_tb_addr =
                    660:                            sc->sc_tx_map[t]->dm_segs[n].ds_addr;
                    661:                        SC_TBD(sc->sc_next_tbd + n)->tbd_size =
                    662:                            sc->sc_tx_map[t]->dm_segs[n].ds_len;
                    663:                        SC_TBD(sc->sc_next_tbd + n)->tbd_link_addr =
1.8       perry     664:                            IEE_PHYS_SHMEM(IEE_TBD_OFF + IEE_TBD_SZ
1.1       jkunz     665:                            * (sc->sc_next_tbd + n + 1));
                    666:                }
                    667:                SC_TBD(sc->sc_next_tbd + n - 1)->tbd_size |= IEE_CB_EL;
                    668:                bus_dmamap_sync(sc->sc_dmat, sc->sc_tx_map[t], 0,
                    669:                    sc->sc_tx_map[t]->dm_mapsize, BUS_DMASYNC_PREWRITE);
                    670:                IFQ_POLL(&ifp->if_snd, m);
                    671:                if (m == NULL)
                    672:                        iee_cb_setup(sc, IEE_CB_CMD_TR | IEE_CB_S | IEE_CB_EL
                    673:                            | IEE_CB_I);
                    674:                else
                    675:                        iee_cb_setup(sc, IEE_CB_CMD_TR);
                    676:                sc->sc_next_tbd += n;
                    677: #if NBPFILTER > 0
                    678:                /* Pass packet to bpf if someone listens. */
                    679:                if (ifp->if_bpf)
                    680:                        bpf_mtap(ifp->if_bpf, sc->sc_tx_mbuf[t]);
                    681: #endif
                    682:        }
                    683:        if (t == 0)
                    684:                /* No packets got set up for TX. */
                    685:                return;
                    686:        if (t == IEE_NCB)
                    687:                ifp->if_flags |= IFF_OACTIVE;
                    688:        bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_CB_SZ,
                    689:            IEE_CB_LIST_SZ + IEE_TBD_LIST_SZ, BUS_DMASYNC_PREWRITE);
                    690:        (sc->sc_iee_cmd)(sc, IEE_SCB_CUC_EXE);
                    691:        return;
                    692: }
                    693:
                    694:
                    695:
                    696: /* ioctl routine */
                    697: int
1.15      christos  698: iee_ioctl(struct ifnet *ifp, u_long cmd, void *data)
1.1       jkunz     699: {
                    700:        struct iee_softc *sc = ifp->if_softc;
                    701:        int s;
                    702:        int err;
                    703:
                    704:        s = splnet();
1.4       thorpej   705:        switch (cmd) {
                    706:        case SIOCSIFMEDIA:
                    707:        case SIOCGIFMEDIA:
                    708:                err = ifmedia_ioctl(ifp, (struct ifreq *) data,
                    709:                    &sc->sc_ifmedia, cmd);
                    710:                break;
                    711:
                    712:        default:
1.1       jkunz     713:                err = ether_ioctl(ifp, cmd, data);
1.4       thorpej   714:                if (err == ENETRESET) {
                    715:                        /*
                    716:                         * Multicast list as changed; set the hardware filter
                    717:                         * accordingly.
                    718:                         */
                    719:                        if (ifp->if_flags & IFF_RUNNING) {
                    720:                                iee_cb_setup(sc, IEE_CB_CMD_MCS | IEE_CB_S |
                    721:                                    IEE_CB_EL | IEE_CB_I);
                    722:                                if ((sc->sc_flags & IEE_WANT_MCAST) == 0)
                    723:                                        (*sc->sc_iee_cmd)(sc, IEE_SCB_CUC_EXE);
                    724:                        }
1.3       thorpej   725:                        err = 0;
1.4       thorpej   726:                }
                    727:                break;
1.1       jkunz     728:        }
                    729:        splx(s);
                    730:        return(err);
                    731: }
                    732:
                    733:
                    734:
                    735: /* init routine */
                    736: int
                    737: iee_init(struct ifnet *ifp)
                    738: {
                    739:        struct iee_softc *sc = ifp->if_softc;
                    740:        int r;
                    741:        int t;
                    742:        int n;
                    743:        int err;
                    744:
                    745:        sc->sc_next_cb = 0;
                    746:        sc->sc_next_tbd = 0;
                    747:        sc->sc_flags &= ~IEE_WANT_MCAST;
                    748:        sc->sc_rx_done = 0;
                    749:        SC_SCB->scb_crc_err = 0;
                    750:        SC_SCB->scb_align_err = 0;
                    751:        SC_SCB->scb_resource_err = 0;
                    752:        SC_SCB->scb_overrun_err = 0;
                    753:        SC_SCB->scb_rcvcdt_err = 0;
                    754:        SC_SCB->scb_short_fr_err = 0;
                    755:        sc->sc_crc_err = 0;
                    756:        sc->sc_align_err = 0;
                    757:        sc->sc_resource_err = 0;
                    758:        sc->sc_overrun_err = 0;
                    759:        sc->sc_rcvcdt_err = 0;
                    760:        sc->sc_short_fr_err = 0;
                    761:        sc->sc_tx_col = 0;
                    762:        sc->sc_rx_err = 0;
                    763:        sc->sc_cmd_err = 0;
                    764:        /* Create Transmit DMA maps. */
                    765:        for (t = 0 ; t < IEE_NCB ; t++) {
                    766:                if (sc->sc_tx_map[t] == NULL && bus_dmamap_create(sc->sc_dmat,
1.8       perry     767:                    MCLBYTES, IEE_NTBD, MCLBYTES, 0, BUS_DMA_NOWAIT,
1.1       jkunz     768:                    &sc->sc_tx_map[t]) != 0) {
1.8       perry     769:                        printf("%s: iee_init: can't create TX DMA map\n",
1.1       jkunz     770:                            sc->sc_dev.dv_xname);
                    771:                        for (n = 0 ; n < t ; n++)
1.8       perry     772:                                bus_dmamap_destroy(sc->sc_dmat,
1.1       jkunz     773:                                    sc->sc_tx_map[n]);
                    774:                        return(ENOBUFS);
                    775:                }
                    776:        }
                    777:        /* Initialize Receive Frame and Receive Buffer Descriptors */
                    778:        err = 0;
                    779:        memset(SC_RFD(0), 0, IEE_RFD_LIST_SZ);
                    780:        memset(SC_RBD(0), 0, IEE_RBD_LIST_SZ);
                    781:        for (r = 0 ; r < IEE_NRFD ; r++) {
                    782:                SC_RFD(r)->rfd_cmd = IEE_RFD_SF;
                    783:                SC_RFD(r)->rfd_link_addr = IEE_PHYS_SHMEM(IEE_RFD_OFF
                    784:                    + IEE_RFD_SZ * ((r + 1) % IEE_NRFD));
                    785:
1.8       perry     786:                SC_RBD(r)->rbd_next_rbd = IEE_PHYS_SHMEM(IEE_RBD_OFF
1.1       jkunz     787:                    + IEE_RBD_SZ * ((r + 1) % IEE_NRFD));
                    788:                if (sc->sc_rx_mbuf[r] == NULL) {
                    789:                        MGETHDR(sc->sc_rx_mbuf[r], M_DONTWAIT, MT_DATA);
                    790:                        if (sc->sc_rx_mbuf[r] == NULL) {
1.8       perry     791:                                printf("%s: iee_init: can't allocate mbuf\n",
1.1       jkunz     792:                                    sc->sc_dev.dv_xname);
                    793:                                err = 1;
                    794:                                break;
                    795:                        }
                    796:                        MCLAIM(sc->sc_rx_mbuf[r],&sc->sc_ethercom.ec_rx_mowner);
                    797:                        MCLGET(sc->sc_rx_mbuf[r], M_DONTWAIT);
                    798:                        if ((sc->sc_rx_mbuf[r]->m_flags & M_EXT) == 0) {
                    799:                                printf("%s: iee_init: can't allocate mbuf"
                    800:                                    " cluster\n", sc->sc_dev.dv_xname);
                    801:                                m_freem(sc->sc_rx_mbuf[r]);
                    802:                                err = 1;
                    803:                                break;
                    804:                        }
                    805:                }
                    806:                if (sc->sc_rx_map[r] == NULL && bus_dmamap_create(sc->sc_dmat,
1.8       perry     807:                    MCLBYTES, 1, MCLBYTES , 0, BUS_DMA_NOWAIT,
1.1       jkunz     808:                    &sc->sc_rx_map[r]) != 0) {
                    809:                                printf("%s: iee_init: can't create RX "
                    810:                                    "DMA map\n", sc->sc_dev.dv_xname);
                    811:                                m_freem(sc->sc_rx_mbuf[r]);
                    812:                                err = 1;
                    813:                                break;
                    814:                        }
                    815:                if (bus_dmamap_load(sc->sc_dmat, sc->sc_rx_map[r],
1.8       perry     816:                    sc->sc_rx_mbuf[r]->m_ext.ext_buf,
1.1       jkunz     817:                    sc->sc_rx_mbuf[r]->m_ext.ext_size, NULL,
                    818:                    BUS_DMA_READ | BUS_DMA_NOWAIT) != 0) {
                    819:                        printf("%s: iee_init: can't load RX DMA map\n",
                    820:                            sc->sc_dev.dv_xname);
                    821:                        bus_dmamap_destroy(sc->sc_dmat, sc->sc_rx_map[r]);
                    822:                        m_freem(sc->sc_rx_mbuf[r]);
                    823:                        err = 1;
                    824:                        break;
                    825:                }
                    826:                bus_dmamap_sync(sc->sc_dmat, sc->sc_rx_map[r], 0,
                    827:                    sc->sc_rx_mbuf[r]->m_ext.ext_size, BUS_DMASYNC_PREREAD);
                    828:                SC_RBD(r)->rbd_size = sc->sc_rx_map[r]->dm_segs[0].ds_len;
                    829:                SC_RBD(r)->rbd_rb_addr= sc->sc_rx_map[r]->dm_segs[0].ds_addr;
                    830:        }
                    831:        SC_RFD(0)->rfd_rbd_addr = IEE_PHYS_SHMEM(IEE_RBD_OFF);
                    832:        if (err != 0) {
                    833:                for (n = 0 ; n < r; n++) {
                    834:                        m_freem(sc->sc_rx_mbuf[n]);
                    835:                        sc->sc_rx_mbuf[n] = NULL;
                    836:                        bus_dmamap_unload(sc->sc_dmat, sc->sc_rx_map[n]);
                    837:                        bus_dmamap_destroy(sc->sc_dmat, sc->sc_rx_map[n]);
                    838:                        sc->sc_rx_map[n] = NULL;
                    839:                }
                    840:                for (n = 0 ; n < t ; n++) {
                    841:                        bus_dmamap_destroy(sc->sc_dmat, sc->sc_tx_map[n]);
                    842:                        sc->sc_tx_map[n] = NULL;
                    843:                }
                    844:                return(ENOBUFS);
                    845:        }
                    846:
                    847:        (sc->sc_iee_reset)(sc);
                    848:        iee_cb_setup(sc, IEE_CB_CMD_IAS);
                    849:        sc->sc_cf[0] = IEE_CF_0_DEF | IEE_CF_0_PREF;
                    850:        sc->sc_cf[1] = IEE_CF_1_DEF;
                    851:        sc->sc_cf[2] = IEE_CF_2_DEF;
1.8       perry     852:        sc->sc_cf[3] = IEE_CF_3_ADDRLEN_DEF | IEE_CF_3_NSAI
1.1       jkunz     853:            | IEE_CF_3_PREAMLEN_DEF;
                    854:        sc->sc_cf[4] = IEE_CF_4_DEF;
                    855:        sc->sc_cf[5] = IEE_CF_5_DEF;
                    856:        sc->sc_cf[6] = IEE_CF_6_DEF;
                    857:        sc->sc_cf[7] = IEE_CF_7_DEF;
                    858:        sc->sc_cf[8] = IEE_CF_8_DEF;
                    859:        sc->sc_cf[9] = IEE_CF_9_DEF;
                    860:        sc->sc_cf[10] = IEE_CF_10_DEF;
                    861:        sc->sc_cf[11] = IEE_CF_11_DEF & ~IEE_CF_11_LNGFLD;
                    862:        sc->sc_cf[12] = IEE_CF_12_DEF;
                    863:        sc->sc_cf[13] = IEE_CF_13_DEF;
                    864:        iee_cb_setup(sc, IEE_CB_CMD_CONF | IEE_CB_S | IEE_CB_EL);
                    865:        SC_SCB->scb_rfa_addr = IEE_PHYS_SHMEM(IEE_RFD_OFF);
                    866:        bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, 0, IEE_SHMEM_MAX,
                    867:            BUS_DMASYNC_PREWRITE);
                    868:        (sc->sc_iee_cmd)(sc, IEE_SCB_CUC_EXE | IEE_SCB_RUC_ST);
                    869:        /* Issue a Channel Attention to ACK interrupts we may have caused. */
                    870:        (sc->sc_iee_cmd)(sc, IEE_SCB_ACK);
                    871:
                    872:        /* Mark the interface as running and ready to RX/TX packets. */
                    873:        ifp->if_flags |= IFF_RUNNING;
                    874:        ifp->if_flags &= ~IFF_OACTIVE;
                    875:        return(0);
                    876: }
                    877:
                    878:
                    879:
                    880: /* stop routine */
                    881: void
                    882: iee_stop(struct ifnet *ifp, int disable)
                    883: {
                    884:        struct iee_softc *sc = ifp->if_softc;
                    885:        int n;
                    886:
                    887:        ifp->if_flags &= ~IFF_RUNNING;
                    888:        ifp->if_flags |= IFF_OACTIVE;
                    889:        ifp->if_timer = 0;
                    890:        /* Reset the chip to get it quiet. */
                    891:        (sc->sc_iee_reset)(ifp->if_softc);
                    892:        /* Issue a Channel Attention to ACK interrupts we may have caused. */
                    893:        (sc->sc_iee_cmd)(ifp->if_softc, IEE_SCB_ACK);
1.12      skrll     894:        /* Release any dynamically allocated resources. */
1.1       jkunz     895:        for (n = 0 ; n < IEE_NCB ; n++) {
                    896:                if (sc->sc_tx_map[n] != NULL)
                    897:                        bus_dmamap_destroy(sc->sc_dmat, sc->sc_tx_map[n]);
                    898:                sc->sc_tx_map[n] = NULL;
                    899:        }
                    900:        for (n = 0 ; n < IEE_NRFD ; n++) {
                    901:                if (sc->sc_rx_mbuf[n] != NULL)
                    902:                        m_freem(sc->sc_rx_mbuf[n]);
                    903:                sc->sc_rx_mbuf[n] = NULL;
                    904:                if (sc->sc_rx_map[n] != NULL) {
                    905:                        bus_dmamap_unload(sc->sc_dmat, sc->sc_rx_map[n]);
                    906:                        bus_dmamap_destroy(sc->sc_dmat, sc->sc_rx_map[n]);
                    907:                }
                    908:                sc->sc_rx_map[n] = NULL;
                    909:        }
                    910:        return;
                    911: }
                    912:
                    913:
                    914:
                    915: /* timer routine */
                    916: void
                    917: iee_watchdog(struct ifnet *ifp)
                    918: {
                    919:        struct iee_softc *sc = ifp->if_softc;
                    920:
                    921:        (sc->sc_iee_reset)(sc);
                    922:        if (sc->sc_next_tbd != 0)
1.8       perry     923:                printf("%s: iee_watchdog: transmit timeout %d\n",
1.1       jkunz     924:                    sc->sc_dev.dv_xname, ++sc->sc_tx_timeout);
                    925:        else
1.8       perry     926:                printf("%s: iee_watchdog: setup timeout %d\n",
1.1       jkunz     927:                    sc->sc_dev.dv_xname, ++sc->sc_setup_timeout);
                    928:        iee_init(ifp);
                    929:        return;
                    930: }

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